Openvswitch attempts to use IPv6 packet parsing functions without
any dependency on IPv6 (unlike every other place in kernel). Pull
the IPv6 code in openvswitch togeter and put a conditional that's
dependent on CONFIG_IPV6.
Resolves:
net/built-in.o: In function `ovs_flow_extract':
(.text+0xbf5d5): undefined reference to `ipv6_skip_exthdr'
Signed-off-by: Vlad Yasevich <vyase...@redhat.com>
---
net/openvswitch/flow.c | 168 ++++++++++++++++++++++++-----------------------
1 files changed, 86 insertions(+), 82 deletions(-)
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index 98c7063..6dfaf60 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -124,6 +124,7 @@ u64 ovs_flow_used_time(unsigned long flow_jiffies)
(offsetof(struct sw_flow_key, field) + \
FIELD_SIZEOF(struct sw_flow_key, field))
+#if IS_ENABLED(CONFIG_IPV6)
static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key,
int *key_lenp)
{
@@ -175,6 +176,89 @@ static bool icmp6hdr_ok(struct sk_buff *skb)
sizeof(struct icmp6hdr));
}
+static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
+ int *key_lenp, int nh_len)
+{
+ struct icmp6hdr *icmp = icmp6_hdr(skb);
+ int error = 0;
+ int key_len;
+
+ /* The ICMPv6 type and code fields use the 16-bit transport port
+ * fields, so we need to store them in 16-bit network byte order.
+ */
+ key->ipv6.tp.src = htons(icmp->icmp6_type);
+ key->ipv6.tp.dst = htons(icmp->icmp6_code);
+ key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
+
+ if (icmp->icmp6_code == 0 &&
+ (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||
+ icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) {
+ int icmp_len = skb->len - skb_transport_offset(skb);
+ struct nd_msg *nd;
+ int offset;
+
+ key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
+
+ /* In order to process neighbor discovery options, we need the
+ * entire packet.
+ */
+ if (unlikely(icmp_len < sizeof(*nd)))
+ goto out;
+ if (unlikely(skb_linearize(skb))) {
+ error = -ENOMEM;
+ goto out;
+ }
+
+ nd = (struct nd_msg *)skb_transport_header(skb);
+ key->ipv6.nd.target = nd->target;
+ key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
+
+ icmp_len -= sizeof(*nd);
+ offset = 0;
+ while (icmp_len >= 8) {
+ struct nd_opt_hdr *nd_opt =
+ (struct nd_opt_hdr *)(nd->opt + offset);
+ int opt_len = nd_opt->nd_opt_len * 8;
+
+ if (unlikely(!opt_len || opt_len > icmp_len))
+ goto invalid;
+
+ /* Store the link layer address if the appropriate
+ * option is provided. It is considered an error if
+ * the same link layer option is specified twice.
+ */
+ if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR
+ && opt_len == 8) {
+ if
(unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
+ goto invalid;
+ memcpy(key->ipv6.nd.sll,
+ &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
+ } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR
+ && opt_len == 8) {
+ if
(unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
+ goto invalid;
+ memcpy(key->ipv6.nd.tll,
+ &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
+ }
+
+ icmp_len -= opt_len;
+ offset += opt_len;
+ }
+ }
+
+ goto out;
+
+invalid:
+ memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target));
+ memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll));
+ memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll));
+
+out:
+ *key_lenp = key_len;
+ return error;
+}
+#endif
+
#define TCP_FLAGS_OFFSET 13
#define TCP_FLAG_MASK 0x3f
@@ -487,88 +571,6 @@ static __be16 parse_ethertype(struct sk_buff *skb)
return llc->ethertype;
}
-static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
- int *key_lenp, int nh_len)
-{
- struct icmp6hdr *icmp = icmp6_hdr(skb);
- int error = 0;
- int key_len;
-
- /* The ICMPv6 type and code fields use the 16-bit transport port
- * fields, so we need to store them in 16-bit network byte order.
- */
- key->ipv6.tp.src = htons(icmp->icmp6_type);
- key->ipv6.tp.dst = htons(icmp->icmp6_code);
- key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
-
- if (icmp->icmp6_code == 0 &&
- (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||
- icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) {
- int icmp_len = skb->len - skb_transport_offset(skb);
- struct nd_msg *nd;
- int offset;
-
- key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
-
- /* In order to process neighbor discovery options, we need the
- * entire packet.
- */
- if (unlikely(icmp_len < sizeof(*nd)))
- goto out;
- if (unlikely(skb_linearize(skb))) {
- error = -ENOMEM;
- goto out;
- }
-
- nd = (struct nd_msg *)skb_transport_header(skb);
- key->ipv6.nd.target = nd->target;
- key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
-
- icmp_len -= sizeof(*nd);
- offset = 0;
- while (icmp_len >= 8) {
- struct nd_opt_hdr *nd_opt =
- (struct nd_opt_hdr *)(nd->opt + offset);
- int opt_len = nd_opt->nd_opt_len * 8;
-
- if (unlikely(!opt_len || opt_len > icmp_len))
- goto invalid;
-
- /* Store the link layer address if the appropriate
- * option is provided. It is considered an error if
- * the same link layer option is specified twice.
- */
- if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR
- && opt_len == 8) {
- if
(unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
- goto invalid;
- memcpy(key->ipv6.nd.sll,
- &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
- } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR
- && opt_len == 8) {
- if
(unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
- goto invalid;
- memcpy(key->ipv6.nd.tll,
- &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
- }
-
- icmp_len -= opt_len;
- offset += opt_len;
- }
- }
-
- goto out;
-
-invalid:
- memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target));
- memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll));
- memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll));
-
-out:
- *key_lenp = key_len;
- return error;
-}
-
/**
* ovs_flow_extract - extracts a flow key from an Ethernet frame.
* @skb: sk_buff that contains the frame, with skb->data pointing to the
@@ -712,6 +714,7 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port,
struct sw_flow_key *key,
key_len = SW_FLOW_KEY_OFFSET(ipv4.arp);
}
}
+#if IS_ENABLED(CONFIG_IPV6)
} else if (key->eth.type == htons(ETH_P_IPV6)) {
int nh_len; /* IPv6 Header + Extensions */
@@ -752,6 +755,7 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port,
struct sw_flow_key *key,
goto out;
}
}
+#endif
}
out:
--
1.7.7.6
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